Good points! Thanks for the replies, and thanks for your honesty.
I am something of a beginner at this, so I've been carrying one experiment after another through successive brews. I must admit that it may not necessarily make sense, but I've been sticking to things that taste good in the long run. The two different fermentable sugars could easily be combined as; a single sugar. I just got in the habit of mixing them when I found myself short of dextrose and had to pilfer some from the baking drawer in the kitchen. I don't see the lactose as doing the same thing, though, as it is not fermentable.
As for naming the brew, I really don't know what to call it, but the oatmeal and wheat are defining elements of the beer, so I've put that in the name.
Thanks again. As I said, I'm fairly new at this, having brewed just over a dozen batches.
Cheers!
Tom